关于退出登陆

<?php

namespace control\user;

use control\common\userCommon;
use GatewayWorker\Lib\Gateway;

class logout extends userCommon
{

    public function main()
    {

        $sess = $this->getSession();
        $this->setSession(array());

        if (Gateway::isOnline($this->clientId) && isset($sess)) {
            Gateway::unbindUid($this->clientId, $sess);
        }

        $this->outPut();
    }

}